How does an Ethiopian dam increase malaria? Entomological determinants around the Koka reservoir
How does an Ethiopian dam increase malaria? Entomological determinants around the Koka reservoir
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DOI：
10.1111/j.1365-3156.2012.03077.x
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发表时间：
2012-11-01
影响因子：
3.3
通讯作者：
McCartney, Matthew
中科院分区：
文献类型：
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作者：
Kibret, Solomon;Lautze, Jonathan;McCartney, Matthew
目标 确定埃塞俄比亚中部科卡水库附近疟疾传播增加的昆虫学决定因素。方法 2006年8月至2007年12月在Koka水库附近（6公里）的村庄收集蚊子幼虫和成虫。对成年蚊子进行了血粉和子孢子来源的测试。结果在水库村庄，岸线水坑和坝基渗漏处是按蚊繁殖最多的栖息地。在距离大坝较远的村庄（对照村庄），雨水池是重要的繁殖栖息地。在水库附近的村庄中发现的成熟按蚊幼虫数量大约是其五倍，成年按蚊数量大约是其六倍。阿拉伯按蚊和法罗按蚊是整个研究期间水库村庄中最丰富的物种。大多数按蚊成虫和幼虫是在疟疾传播高峰季节（九月至十月）收集的。血粉测试表明，A. arabiensis 以人类为食（74.6%）比 A. pharoensis（62.3%）更常见。水库村庄存在感染恶性疟原虫的阿拉伯疟原虫（0.971.32%）和法罗疟原虫（0.470.70%）。对照村庄中不存在感染恶性疟原虫的按蚊。结论 科卡水库有助于增加按蚊繁殖地的数量。这可能是水库村庄疟疾病媒较多、疟疾病例较多的原因。应考虑通过减少源头干预措施来补充当前的疟疾控制策略，以减少水库附近的疟疾。
Objectives To identify entomological determinants of increased malaria transmission in the vicinity of the Koka reservoir in Central Ethiopia. Methods Larval and adult mosquitoes were collected between August 2006 and December 2007 in villages close to (6 km) the Koka reservoir. Adult mosquitoes were tested for the source of blood meal and sporozoites. Results In reservoir villages, shoreline puddles and seepage at the base of the dam were the most productive Anopheles-breeding habitats. In villages farther from the dam (control villages), rain pools were important breeding habitats. About five times more mature anopheline larvae and six times more adult anophelines were found in the villages near the reservoir. Anopheles arabiensis and Anopheles pharoensis were the most abundant species in the reservoir villages throughout the study period. The majority of adult and larval anophelines were collected during the peak malaria transmission season (SeptemberOctober). Blood meal tests suggested that A. arabiensis fed on humans more commonly (74.6%) than A. pharoensis (62.3%). Plasmodium falciparum-infected A. arabiensis (0.971.32%) and A. pharoensis (0.470.70%) were present in the reservoir villages. No P. falciparum-infected anophelines were present in the control villages. Conclusions The Koka reservoir contributes to increased numbers of productive Anopheles-breeding sites. This is the likely the cause for the greater abundance of malaria vectors and higher number of malaria cases evidenced in the reservoir villages. Complementing current malaria control strategies with source reduction interventions should be considered to reduce malaria in the vicinity of the reservoir.